JP7153875B2 - GAS DETECTION SYSTEM, CONTROL METHOD FOR GAS DETECTION SYSTEM, AND PROGRAM - Google Patents

Description

The present disclosure relates to a gas detection system, a gas detection system control method, and a program. More specifically, the present disclosure relates to a gas detection system that detects a gas component to be detected in air, a control method for the gas detection system, and a program.

Patent Literature 1 discloses a vehicle odor discrimination system. The vehicle odor discrimination system (gas detection system) of Patent Document 1 includes odor detection devices (gas detection units) provided at a plurality of locations on the surface of a seat on which a vehicle occupant sits, and detects signals from the odor detection devices. to identify the occupant seated on the seat. The vehicle odor discrimination system has a personal data accumulation and analysis unit that analyzes past data on the identified individual and grasps the illness of the occupant and the state of change in the illness. occupants are notified.

Japanese Patent Application Laid-Open No. 2017-161300

In the vehicle odor discrimination system of Patent Document 1, for example, if the gas component to be detected is diffused by the air current generated by the air conditioning system provided in the vehicle, or if the odors of multiple occupants are mixed, the determination result will be inaccurate. could become.

An object of the present disclosure is to provide a gas detection system capable of efficiently collecting air, a control method for the gas detection system, and a program.

A gas detection system according to one aspect of the present disclosure includes a suction unit and a suction control unit. The suction unit sucks air from the target space and guides the sucked air to the gas detection unit. The gas detection unit detects gas components in the air. The suction control section controls the suction state of the suction section based on the determination information. The determination information includes at least target component information regarding a gas component to be detected by the gas detection unit. The determination information further includes at least one of air-conditioning information regarding the operation status of an air-conditioning system that adjusts the air in the target space and person-related information regarding a person present in the target space. A plurality of pieces of information included in the determination information are each attached with a weighting factor used when controlling the suction state of the suction section.

A gas detection system control method according to one aspect of the present disclosure includes processing for controlling a state of suction by a suction unit based on determination information. The suction unit sucks air from the target space and guides the sucked air to the gas detection unit. The gas detection unit detects gas components in the air. The determination information includes at least target component information regarding a gas component to be detected by the gas detection unit. The determination information further includes at least one of air-conditioning information regarding the operation status of an air-conditioning system that adjusts the air in the target space and person-related information regarding a person present in the target space. A plurality of pieces of information included in the determination information are each attached with a weighting factor used when controlling the suction state of the suction section.

A program according to one aspect of the present disclosure is a program for causing a computer system to execute a process of controlling a state of suction by a suction unit based on determination information. The suction unit sucks air from the target space and guides the sucked air to the gas detection unit. The gas detection unit detects gas components in the air. The determination information includes at least target component information regarding a gas component to be detected by the gas detection unit. The determination information further includes at least one of air-conditioning information regarding the operation status of an air-conditioning system that adjusts the air in the target space and person-related information regarding a person present in the target space. A plurality of pieces of information included in the determination information are each attached with a weighting factor used when controlling the suction state of the suction section.

ADVANTAGE OF THE INVENTION According to this indication, the gas detection system which can collect air efficiently, the control method of a gas detection system, and a program can be provided.

FIG. 1 is a block diagram of an overall system including a gas detection system of one embodiment of the present disclosure; FIG. FIG. 2 is a schematic illustration of a moving object equipped with the same gas detection system. FIG. 3 is a flow chart showing the operation of the same gas detection system.

The embodiment described below is but one of the various embodiments of the present disclosure. Embodiments of the present disclosure are not limited to the following embodiments, and may include other embodiments. In addition, the following embodiments can be modified in various ways according to design and the like without departing from the technical idea of the present disclosure.

(embodiment)
(1) Outline As shown in FIG. 1, the gas detection system 1 of this embodiment includes a suction unit 21 and a suction control unit 12. As shown in FIG. The suction unit 21 sucks air from the target space and guides the sucked air to the gas detection unit 22 . The gas detection unit 22 detects gas components in the air. The suction control unit 12 controls the state of suction by the suction unit 21 based on the determination information. The determination information includes at least target component information regarding the gas component to be detected by the gas detection unit 22 .

Here, the target space is a space in which the air to be detected by the gas detection system 1 exists. In the following embodiments, the case where the target space includes the indoor space 102 of a mobile object 100 (see FIG. 2) such as an automobile will be described as an example. That is, the gas detection system 1 detects gas components in exhalation of a person 200 (specifically, a driver 201 sitting in a driver's seat 110) riding a mobile object 100, and the object space is moving. A moving body main body 101 of the body 100 forms an indoor space 102 for a person 200 to ride. Further, the state of suction by the suction unit 21 is a state related to the suction operation in which the suction unit 21 sucks air. The suction state of the suction unit 21 includes at least one of the air suction force of the suction unit 21 and the time during which the suction unit 21 sucks air. The time during which the suction unit 21 sucks air includes at least one of the length of time during which the suction unit 21 performs the suction operation and the cycle of the suction operation. Further, the gas component to be detected by the gas detection unit 22 is, for example, a gas component contained in human exhalation. Exhaled gas components include, for example, gas components generated due to stress. Exhaled gas components generated due to stress include, for example, indole and benzaldehyde, but other gas components may also be included. In addition, the gas components in exhaled breath to be detected include alcohol components such as ethanol, odor components such as acetaldehyde and methyl mercaptan, and gas components generated due to diseases of the digestive system or respiratory system. It may contain at least one gas component among them.

As described above, the suction control unit 12 controls the operating state of the suction unit 21 based on determination information including at least target component information regarding gas components to be detected. Therefore, the suction control section 12 can guide the amount of air necessary for detecting the gas component to be detected to the gas detection section 22, and the amount of air led to the gas detection section 22 becomes insufficient or excessive. It becomes difficult to happen. Therefore, the gas detection system 1 capable of efficiently collecting air can be provided.

The concentrations of alcohol components and odor components are on the order of ppm, whereas the concentrations of gas components generated due to stress are on the order of ppt to ppb. Therefore, in order to detect gas components generated due to stress, it is required to measure the gas components to be detected with higher accuracy than in the case of detecting alcohol components and odor components. Here, if the gas detection unit 22 has a concentration function that increases the concentration of the gas component by adsorbing the gas component in the air, the concentration function increases the amount of air that the suction unit 21 sucks. The amount of adsorbed gas components can be increased. Therefore, by increasing the amount of air sucked by the suction unit 21, the concentration of the gas components concentrated by the concentration function of the gas detection unit 22 can be increased, and the gas detection unit 22 detects gas components with lower concentrations. detection becomes possible.

(2) Details Hereinafter, the gas detection system 1 according to the present embodiment and the moving object 100 including the gas detection system 1 will be described in detail with reference to the drawings.

(2.1) Configuration A gas detection system 1 of the present embodiment is provided in a moving body 100 . The gas detection system 1 is electrically connected to an ECU (Electronic Control Unit) 30 , an air conditioning system 40 , a human detection system 50 , etc. via a network 60 such as a CAN (Controller Area Network) provided in a mobile body 100 . It is connected.

First, of the entire system including the gas detection system 1, the configuration other than the gas detection system 1 will be described.

The ECU 30 performs overall control of the mobile body 100, for example. The ECU 30 has a function of controlling a driving system 31 such as a driving system, a braking system, and a steering system of the moving body 100, for example. The drive system is, for example, a system that controls a prime mover, a transmission mechanism, and the like included in the mobile body 100 to rotate drive wheels of the mobile body 100 . The braking system is a system that applies braking force to the wheels of the moving body 100 . The steering system is a system that controls the direction in which the mobile body 100 moves by driving steering wheels provided on the mobile body 100 . The ECU 30 also has a function of controlling an opening/closing system for opening and closing the windows of the moving body 100 . The ECU 30 has a function of transmitting, for example, instruction information indicating a gas component to be detected to the gas detection system 1 via the network 60 according to the situation of the mobile object 100 . Therefore, the gas detection system 1 can acquire target component information about the gas component to be detected by the gas detection unit 22 from the ECU 30 via the network 60 . Further, the gas detection system 1 can acquire mobile body information indicating the status of the mobile body 100 from the ECU 30 via the network 60 . Here, the mobile body information includes information indicating the operation status of the driving system 31, information indicating the operation status of the opening/closing system controlled by the ECU 30 (that is, information indicating the opening/closing status of the windows of the mobile body 100), and the like. including.

The air conditioning system 40 adjusts at least one of the temperature, humidity, and cleanliness of the air in the indoor space 102 of the mobile body 100 . The air conditioning system 40 adjusts the air in the indoor space 102 in accordance with, for example, control signals received from the ECU 30 . The air-conditioning system 40 transmits air-conditioning information regarding the operation status of the air-conditioning system 40 to the gas detection system 1 via the network 60 in response to a request from the gas detection system 1, for example.

The human detection system 50 detects a person 200 in the indoor space 102 of the moving body 100 by processing the image captured by the camera 51 that captures the indoor space 102 . The camera 51 has an image sensor such as a CMOS (Complementary Metal Oxide Semiconductor) image sensor and optical system components such as a wide-angle lens. The camera 51 is attached, for example, to the front part of the ceiling of the mobile object 100, and photographs the indoor space 102 from the front. In the example of FIG. 2, persons 200 are seated in the driver's seat 110 and the rear seat 120 respectively, and the camera 51 is directed to the persons 200 seated in the front seats including the driver's seat 110 and the front passenger seat, and in the rear seat 120, respectively. is placed at a position where it can be imaged. Here, the person 200 sitting in the driver's seat 110 may be called the driver 201 and the person 200 sitting in the rear seat 120 may be called the passenger 202 .

The human detection system 50 detects human-related information about the people 200 (the driver 201 and the fellow passengers 202 ) present in the indoor space 102 based on the image of the camera 51 . The people-related information includes information about the presence or absence of people 200 in the indoor space 102 and includes information about the number of people present in the indoor space 102 . Also, the person-related information includes information about the state of the person 200 present in the indoor space 102, which is the target space. The information about the state of the person 200 existing in the indoor space 102 is, for example, at least the position of the person 200, the distance between the suction unit 21 and the person 200, the posture of the person 200, and the physique of the person 200. Contains information about one. Human detection system 50 detects the distance between suction unit 21 and person 200 based on the positional relationship between camera 51 and suction unit 21 and the positional relationship between camera 51 and person 200 obtained from the image of camera 51 . can be calculated. The human detection system 50 , for example, in response to a request from the gas detection system 1 , transmits human-related information about a person 200 present in the target space (indoor space 102 ) to the gas detection system 1 via the network 60 . In addition, the human detection system 50 can also detect the action of the person 200 based on the image of the camera 51. For example, the action of smoking or eating and drinking performed by the person 200 can be detected from the movement of the hand or mouth of the person 200. can also

Next, the configuration of the gas detection system 1 of this embodiment will be described. The gas detection system 1 includes a control section 10, a suction section 21, a gas detection section 22, a communication section 23, an operation section 24, and a storage section 25, as shown in FIG.

The suction unit 21 and the gas detection unit 22 are provided inside the seat of the moving body 100 (for example, the driver's seat 110 on which the driver 201 sits). Here, the suction unit 21 is built into the headrest 112 of the driver's seat 110 . Further, the gas detection unit 22 is installed inside the seat of the moving body 100, and is built in the backrest 111 of the driver's seat 110 in this embodiment.

The suction unit 21 includes an intake fan that sucks air from the target space (the indoor space 102 of the moving body 100 in this embodiment). The suction force of the suction fan of the suction unit 21 can be adjusted, and the suction state of the suction unit 21 is controlled according to a control signal input from the suction control unit 12 of the control unit 10 . The suction unit 21 is built in the headrest 112 of the driver's seat 110 on which the driver 201 sits, and sucks air from the partial space 103 in the indoor space 102 where the driver 201 of the moving body 100 exists. Here, partial space 103 is a space in which at least the head of driver 201 exists, and suction unit 21 sucks air from the space including partial space 103 . Since the suction unit 21 is arranged at a position near the head of the driver 201 in the driver's seat 110, it can suck the air around the mouth of the driver 201 (including exhaled air of the driver 201).

The gas detection unit 22 detects gas components in the air guided to the gas detection unit 22 by the suction unit 21 . Gas detector 22 is built into backrest portion 111 of driver's seat 110 . The gas detection unit 22 includes a main body 221 housing a concentrating unit, a sensor unit, and a signal processing unit in a case, an introduction pipe 222 , a pump 224 , and an exhaust pipe 225 . An air suction port 223 on one end side of the introduction pipe 222 is arranged on the rear side of the suction portion 21 , and the other end of the introduction pipe 222 is connected to the main body 221 . The introduction pipe 222 guides the air sucked by the suction part 21 into the internal space of the main body 221 . One end of the exhaust pipe 225 is connected to the main body 221 and the other end of the exhaust pipe 225 is exposed to the outside of the backrest portion 111 . Pump 224 is provided in the middle of exhaust pipe 225 . When the pump 224 sucks air, the air is introduced into the main body 221 from the air suction port 223 through the introduction pipe 222 and exhausted from the main body 221 through the exhaust pipe 225 and the pump 224 to the outside of the backrest portion 111 . The concentrator concentrates the gas components in the air sent into the main body 221 by the pump 224 . The sensor unit includes a sensor array in which a plurality of types of sensors that react with different gas components are arranged one-dimensionally or two-dimensionally. The signal processing unit processes signals output from the sensor array according to the gas components desorbed from the concentrating unit (a pattern in which outputs of multiple types of sensors are arranged one-dimensionally or two-dimensionally), for example, using a machine learning algorithm. By pattern recognition, the type and concentration of the gas component to be detected are detected. In the present embodiment, the concentrating part of the gas detection part 22 concentrates the gas components by adsorbing the gas components in the air introduced into the internal space of the main body 221 through the introduction pipe 222 . Then, the sensor unit detects the type and concentration of the gas component desorbed from the concentration unit (that is, the gas component after concentration), thereby determining the concentration of the gas component in the air (that is, in a non-concentrated state). to detect. Therefore, the sensor part of the gas detection part 22 can measure even a gas component whose concentration is lower than the detection limit of a general gas sensor. For example, while the detection limit of general gas sensors is ppm level, the present embodiment can detect ppt to ppb level gas components generated due to stress. The configuration of the gas detection unit 22 is an example, and in the gas detection unit 22, the air suction port 223 of the introduction pipe 222 may be arranged on the front side of the suction unit 21, and the pump 224 may be provided in the middle of the introduction pipe 222. may be

The communication unit 23 has a function of communicating with the ECU 30 , the air conditioning system 40 , the human detection system 50 and the like via the network 60 .

The operation unit 24 has an input device such as a touch panel. The operation unit 24 outputs information input by the person 200 using the touch panel to the control unit 10 .

The storage unit 25 is configured by a device selected from ROM (Read Only Memory), RAM (Random Access Memory), EEPROM (Electrically Erasable Programmable Read Only Memory), or the like. The storage unit 25 stores information (target component information, air conditioning information, human-related information, etc.) received by the reception unit 11 from the ECU 30, the air conditioning system 40, the human detection system 50, etc., and the information received by the reception unit 11 from the operation unit 24. store the instruction information. The storage unit 25 also stores the detection result of the gas detection unit 22 and the reference value for the detection result of the gas component by the gas detection unit 22 .

The control unit 10 includes, for example, a computer system. A computer system is mainly composed of a processor and a memory as hardware. The functions of the control unit 10 (for example, the functions of the reception unit 11, the suction control unit 12, the determination unit 13, the output processing unit 14, etc.) ) is realized. The program is recorded in advance in the memory or storage unit 25 of the computer system. The program may be provided via an electric communication line, or may be provided by being recorded on a non-temporary recording medium such as a computer system-readable memory card, optical disk, or hard disk drive.

The reception unit 11 receives, via the communication unit 23, information (target component information, air conditioning information, human-related information, etc.) transmitted from the ECU 30, the air conditioning system 40, the human detection system 50, and the like. The reception unit 11 also receives instruction information or the like input by the driver 201 using the operation unit 24, for example. The instruction information is information for instructing the gas component to be detected by the gas detection unit 22 . The reception unit 11 stores information received from the ECU 30, the air conditioning system 40, the human detection system 50, etc. (target component information, air conditioning information, human-related information, etc.) and instruction information received from the operation unit 24 in the storage unit 25. Memorize.

The suction control unit 12 controls the state of air suction by the suction unit 21 based on determination information including at least target component information. Note that the suction control unit 12 of the present embodiment controls the state of air suction by the suction unit 21 based not only on the target component information, but also on the air conditioning information and the person-related information. Here, the state of suction by the suction unit 21 includes the air suction force by the suction unit 21 . In addition, the state of suction by the suction unit 21 includes the time during which the suction unit 21 sucks air. Note that the suction control unit 12 of the present embodiment controls both the suction force and the air suction time as the state of air suction by the suction unit 21. Only one may be controlled.

The determination unit 13 determines whether or not the suction unit 21 is caused to suck air. The determination unit 13 determines whether or not to cause the suction unit 21 to suck air, for example, based on the moving body information received by the reception unit 11 .

For example, when the moving body information includes information indicating that the opening/closing system has opened the window of the moving body 100, the determination unit 13 stops the air suction operation by the suction unit 21. FIG. When the window of the moving body 100 is open, air may flow in from the outside of the moving body 100 or the air in the indoor space 102 may flow out to the outside, which may make it impossible to measure the exhalation of the driver 201 correctly. be. Therefore, when the window of the moving body 100 is open, the determination unit 13 stops the air suction operation by the suction unit 21 and stops the detection operation by the gas detection unit 22, thereby preventing erroneous detection of exhalation of the person 200. can be made less likely to occur.

The mobile information received by the reception unit 11 is not limited to information on the mobile 100 itself, and may include person-related information on the person 200 riding on the mobile 100 . For example, the mobile information received by the reception unit 11 may include information (person-related information) regarding the state of the person 200 detected by the person detection system 50 . If the moving body information received by the receiving part 11 includes information indicating that the person 200 riding on the moving body 100 is smoking, the determination part 13 causes the suction part 21 to suck air. You can stop it. If the person 200 is smoking, the exhalation of the person 200 cannot be detected correctly, and there is a possibility that the concentrating portion of the gas detection unit 22 will become dirty due to cigarette smoke. If the person 200 (the driver 201 or the fellow passenger 202) existing in the indoor space 102 is smoking, the determination unit 13 stops the air suction operation by the suction unit 21 and stops the detection operation by the gas detection unit 22. Let By stopping the air suction operation by the suction unit 21 and the detection operation by the gas detection unit 22 by the determination unit 13, erroneous detection of exhalation of the person 200 is less likely to occur, and the gas detection unit 22 is prevented from becoming dirty. It can be difficult to adhere.

The output processing unit 14 performs processing for outputting the detection result of the gas component by the gas detection unit 22 to the ECU 30 or the like via the communication unit 23 . For example, the ECU 30 controls the air conditioning system 40 based on the detection result of the gas component by the gas detection unit 22 output from the output processing unit 14 . Here, when the gas component to be detected by the gas detection unit 22 is a gas component generated due to the stress of the driver 201, the ECU 30 controls the air conditioning system according to the detection result of the gas component by the gas detection unit 22. control 40; When the concentration of the gas component detected by gas detection unit 22 exceeds a predetermined reference value, ECU 30 controls at least one of temperature, humidity, and cleanliness by air conditioning system 40 to reduce stress on driver 201. to improve the comfort of the indoor space 102. The ECU 30 may operate an audio system provided in the mobile object 100 to reproduce music that relaxes the driver 201 . Note that the output processing unit 14 may display the detection result of the gas component by the gas detection unit 22 on a display device such as a liquid crystal display provided in the gas detection system 1 .

(2.2) Operation The gas detection system 1 of the present embodiment performs a suction operation for causing the suction unit 21 to suck air while the moving object 100 is traveling (including a state of being temporarily stopped during traveling). to do The gas detection system 1 also operates the pump 224 to send the air sucked from the indoor space 102 by the suction unit 21 into the main body 221 . The concentrating part of the gas detection part 22 concentrates the gas components by adsorbing the gas components in the air sent into the main body 221 . The gas detection unit 22 desorbs gas components from the enrichment unit, for example, every time a certain period of time elapses. When the output of the sensor array provided in the sensor unit changes due to the gas components desorbed from the concentration unit, the signal processing unit recognizes the pattern of the output of the sensor array using a machine learning algorithm to determine the concentration of the gas components. Detects type and concentration. Then, the signal processing unit detects the type and concentration of the gas component in the air (that is, the state before concentration) based on the type and concentration of the gas component in the concentrated state.

The gas detection unit 22 of the gas detection system 1 repeats the process of detecting the type and concentration of the gas component periodically or irregularly. A process for controlling the state of suction by the suction unit 21 is repeatedly executed regularly or irregularly.

A process of controlling the suction operation by the suction unit 21 by the suction control unit 12 of the gas detection system 1 will be described below with reference to FIG. 3 .

While the gas detection unit 22 is detecting the type and concentration of the gas component to be detected, the suction control unit 12 periodically or irregularly repeats the process of controlling the suction state of the suction unit 21 .

The suction control unit 12 first acquires target component information from the storage unit 25 . The target component information may be preset in the gas detection system 1 or may be set by the person 200 using the operation unit 24 . For example, when the reception unit 11 receives instruction information input by the person 200 using the operation unit 24, the suction control unit 12 causes the storage unit 25 to store target component information indicating the gas component instructed by the instruction information. Information on the gas component specified by the command information is the target component information. Also, the target component information may be input from the ECU 30 . Here, the ECU 30 determines gas components to be detected according to the situation of the mobile body 100, that is, the situation of the indoor space 102, which is the target space. For example, the ECU 30 sets alcohol as the gas component to be detected at the timing when the moving body 100 starts moving, and detects whether or not the driver 201 is drinking alcohol. Further, the ECU 30 sets the gas component generated due to stress as the gas component to be detected in driving conditions such as highways, mountain roads, nighttime, and bad weather that require the driver 201 to concentrate on driving operations. Thereby, the suction control unit 12 can determine the gas component to be detected according to the situation of the moving body 100, that is, the situation of the indoor space 102, which is the target space.

The suction control unit 12 indicates the suction force of the suction unit 12 based on target component information about the gas component to be detected, air conditioning information obtained from the air conditioning system 40, and human-related information obtained from the human detection system 50. Determine suction levels L1, L2, L3. Then, the suction control unit 12 integrates the suction level L1 based on the target component information, the suction level L2 based on the air conditioning information, and the suction level L3 based on the person-related information, and determines the set level of the suction force of the suction unit 12. Determine L10.

First, when the suction control unit 12 acquires the target component information about the gas component to be detected, the suction control unit 12 determines the suction level L1 (magnitude of the suction force) based on the target component information (S1). The suction control unit 12 determines the suction level L1 such that the lower the reference concentration for determining the presence or absence of the gas component to be detected, the greater the suction force. In addition, the suction control unit 12 determines the state of suction by the suction unit 21 (time during which the suction operation is performed) such that the lower the reference concentration of the gas component to be detected, the longer the time for the suction unit 21 to suck air. do.

Next, the suction control unit 12 acquires air conditioning information from the air conditioning system 40 via the communication unit 23 (S2), and determines the suction level L2 based on the air conditioning information (S3). When the air conditioning system 40 is in operation, the breath of the driver 201 is diffused by the airflow generated by the air conditioning system 40. Therefore, the suction control unit 12 has a larger suction force when the air conditioning system 40 is in operation than when it is stopped. The suction level L2 is determined so that The suction control unit 12 may determine the suction level L2 so that the suction force increases as the air volume of the air conditioning system 40 increases during operation of the air conditioning system 40 . In addition, the suction control unit 12 controls the suction state (the time during which the suction operation is performed) by the suction unit 21 so that the time for which the suction unit 21 sucks air is longer when the air conditioning system 40 is in operation than when it is stopped. decide.

Further, the suction control unit 12 acquires human-related information from the human detection system 50 via the communication unit 23 (S4), and determines the suction level L3 based on the human-related information (S5). When a person 200 other than the driver 201 is on the moving object 100, the exhalation of the person 200 other than the driver 201 may be mixed. Therefore, based on the person-related information, the suction control unit 12 determines the suction level L3 so that the suction force increases as the number of people 200 riding the mobile object 100 increases. Further, the suction control unit 12 adjusts the suction state of the suction unit 21 (time to perform the suction operation) so that the time for the suction unit 21 to suck air increases as the number of people 200 riding on the moving object 100 increases. ).

After determining the suction levels L1, L2, and L3, the suction control unit 12 calculates the set level L10 of the suction force using Equation 1 below (S6).

After calculating the set level L10 of the suction force, the suction control unit 12 determines the suction force based on the set level L10 (S7) so that the suction force of the suction unit 21 becomes the suction force corresponding to the set level L10. , to control the suction state of the suction unit 21 .

As described above, since the suction control unit 12 controls the suction state of the suction unit 21 based on the target component information, the amount of air sucked by the suction unit 21 is adjusted according to the gas component to be detected. can. In addition, since the suction control unit 12 controls the operation state of the suction unit 21 further based on the air conditioning information and the person-related information, based on the operation state of the air conditioning system 40 and the number of people present in the target space, etc. The amount of air sucked by the suction unit 21 can be adjusted by using the Therefore, the amount of air sucked by the suction unit 21 is less likely to be insufficient or excessive, and gas detection can efficiently collect the amount of air necessary to detect the gas component to be detected. A system 1 can be provided. When the suction force of the suction unit 21 becomes excessive, the noise and power consumption of the suction fan provided in the suction unit 21 increase, but the suction control unit 12 controls the suction state of the suction unit 21 based on the target component information. Therefore, noise generated by the suction unit 21 and power consumption can be suppressed.

Further, in the gas detection system 1 , the gas component to be detected can be detected more accurately by the gas detection unit 22 , so processing can be performed according to the detection result of the gas detection unit 22 . By the way, it is also possible to find the stress of the person 200 riding on the mobile object 100 by detecting body movements caused by the stress (for example, blinking, facial spasms, etc.), for example, from camera images. However, there is a possibility that the person 200 is erroneously detected as if the body of the person 200 is moving due to the vibration of the moving body 100 or the like, and the stress of the person 200 may not be accurately detected. It is also possible to indirectly detect the stress of the person 200 by detecting the heartbeat of the person 200 riding on the moving body 100. However, since this is indirect detection, the stress of the person 200 can be accurately detected. may not be detected in On the other hand, the gas detection system 1 of the present embodiment detects the gas component generated due to stress from the breath of the person 200, so the stress of the person 200 can be detected more accurately.

(3) Modifications The embodiment described above is merely one of various embodiments of the present disclosure. The above-described embodiment can be modified in various ways according to design and the like, as long as the object of the present disclosure can be achieved. Further, functions similar to those of the gas detection system 1 may be embodied by a control method of the gas detection system 1, a computer program, or a non-temporary recording medium recording the program. A control method of the gas detection system 1 according to one aspect includes a process of controlling the state of suction by the suction unit 21 based on determination information. The suction unit 21 sucks air from the target space (indoor space 102 ) and guides the sucked air to the gas detection unit 22 . The gas detector 22 detects gas components in the air. The determination information includes at least target component information about the gas component to be detected by the gas detection unit 22 . A (computer) program according to one aspect is a program for causing a computer system to execute a process of controlling the state of suction by the suction unit 21 based on determination information.

Modifications of the above embodiment are listed below. Modifications described below can be applied in combination as appropriate. In addition, below, the said embodiment may be called a "basic example."

Gas detection system 1 in the present disclosure includes a computer system. A computer system is mainly composed of a processor and a memory as hardware. The functions of the gas detection system 1 in the present disclosure are realized by the processor executing a program recorded in the memory of the computer system. The program may be recorded in advance in the memory of the computer system, may be provided through an electric communication line, or may be recorded in a non-temporary recording medium such as a computer system-readable memory card, optical disk, or hard disk drive. may be provided. A processor in a computer system consists of one or more electronic circuits, including semiconductor integrated circuits (ICs) or large scale integrated circuits (LSIs). The integrated circuit such as IC or LSI referred to here is called differently depending on the degree of integration, and includes integrated circuits called system LSI, VLSI (Very Large Scale Integration), or ULSI (Ultra Large Scale Integration). In addition, a field-programmable gate array (FPGA) that is programmed after the LSI is manufactured, or a logic device capable of reconfiguring the bonding relationship inside the LSI or reconfiguring the circuit partitions inside the LSI may also be adopted as the processor. can be done. A plurality of electronic circuits may be integrated into one chip, or may be distributed over a plurality of chips. A plurality of chips may be integrated in one device, or may be distributed in a plurality of devices. A computer system, as used herein, includes a microcontroller having one or more processors and one or more memories. Accordingly, the microcontroller also consists of one or more electronic circuits including semiconductor integrated circuits or large scale integrated circuits.

In the above embodiment, the multiple functions of the gas detection system 1 are distributed among multiple devices. Functionality distributed across multiple devices may be consolidated within a single housing. Further, at least some functions of the gas detection system 1, such as the gas component detection function of the suction control unit 12, the determination unit 13, or the gas detection unit 22, may be realized by the cloud (cloud computing) or the like. .

In the basic example described above, the suction control unit 12 controls the suction state of the suction unit 21 based on the determination information including the target component information, the air conditioning information, and the person-related information. The suction state of the suction unit 21 may be controlled. In other words, the determination information may include only the target component information, but the determination information may include the target component information and the air conditioning information. 21 can be controlled. Further, the determination information may include target component information and person-related information, and controls the suction state of the suction unit 21 based on the gas component to be detected and the person-related information related to the person existing in the target space. be able to.

Further, the determination information may include target component information and at least one of air conditioning information and person-related information. A weighting factor may be assigned to each.

For example, when the suction control unit 12 controls the state of suction by the suction unit based on the target component information, the air conditioning information, and the person-related information, weighting factors B1, Assume that B2 and B3 are set. These weighting factors B1, B2, and B3 may be preset values, may be set based on setting information input from the ECU 30 or the like, or may be set by the person 200 using the operation unit 24. good too.

For example, when the suction control unit 12 determines the suction level L1 based on the target component information, the suction level L2 based on the air conditioning information, and the suction level L3 based on the person-related information, the suction control unit 12 determines the setting level L10 by the following Equation 2. do.

In this manner, the suction control unit 12 determines the suction state of the suction unit 21 (for example, suction force). Therefore, the suction control unit 12 can determine the suction state of the suction unit 21 by increasing the distribution of the suction level based on the information with the higher degree of importance among the target component information, the air conditioning information, and the person-related information. The suction control unit 12 determines the time for the suction unit 21 to perform the suction operation based on the target component information, the air conditioning information, the person-related information, and the weighting coefficients B1, B2, and B3 set for each information. Alternatively, both the suction force and the time to perform the suction operation may be determined.

Note that the suction control unit 12 controls the suction unit to perform You may control a suction state.

The gas detection unit 22 of the gas detection system 1 of the basic example detects gas components generated due to, for example, stress. , a gas component (such as CO2) related to drowsiness of the person 200, or the like may be detected. Moreover, the gas detection unit 22 of the gas detection system 1 may detect gas components that may harm the health of the person 200 (eg, CO, volatile organic compounds (VOC), etc.).

Further, the gas detection system 1 of the basic example is provided in the moving object 100, and the gas detection unit 22 detects the breath of the driver 201, but the gas detection unit 22 detects the breath of a person other than the driver 201. may be detected.

Further, in the gas detection system 1 of the basic example, the suction control unit 12 sets the gas component to be detected based on temperature information regarding the indoor temperature of the indoor space 102 received from the air conditioning system 40 via the communication unit 23, for example. You may For example, when the room temperature is higher than the body temperature, the exhaled air moves to the lower side of the room space 102, and when the room temperature is lower than the body temperature, the expired air moves to the upper side of the room space 102. Therefore, when the room temperature is outside the predetermined temperature range, the suction control unit 12 increases the suction force of the suction unit 21 compared to when the room temperature is within the predetermined temperature range. good too. The predetermined temperature range is, for example, a temperature range that the body temperature of the person 200 can take, for example, a temperature range of 35 degrees or more and 37 degrees or less. As a result, the suction unit 21 can efficiently suck the breath of the driver 201 into the gas detection unit 22 .

In addition, in the gas detection system 1 of the basic example, in comparison of binary values such as measurement data, "exceeds" may be "greater than or equal to". That is, in the comparison of two values, whether or not the two values are equal can be arbitrarily changed depending on the setting of the reference value, etc., so there is no technical difference between "exceeding" and "greater than or equal to". Similarly, "less than" may be used instead of "less than".

Also, in the basic example, the mobile object 100 is an automobile, but the mobile object 20 may be, for example, a mobile object other than an automobile, such as a railway vehicle, a ship, or an aircraft.

(summary)
As described above, the gas detection system (1) according to the first aspect includes a suction part (21) and a suction control part (12). It sucks and guides the sucked air to the gas detector (22). A gas detector (22) detects gas components in the air. The suction control section (12) controls the state of suction by the suction section (21) based on the determination information. The determination information includes at least target component information regarding the gas component to be detected by the gas detection section (22).

According to this aspect, the suction control section (12) controls the operating state of the suction section (21) based on the target component information regarding the gas component to be detected by the gas detection section (22). Therefore, it becomes difficult for the amount of air sucked by the suction part (21) to become insufficient or excessive, and a gas detection system (1) capable of efficiently collecting air can be provided.

In the gas detection system (1) according to the second aspect, in the first aspect, the determination information further includes air conditioning information regarding the operating status of the air conditioning system (40). The air conditioning system (40) conditions the air in the target space (102).

According to this aspect, the suction state of the suction section (21) can be controlled according to the operation status of the air conditioning system (40).

In the gas detection system (1) according to the third aspect, in the first or second aspect, the determination information further includes person-related information regarding a person (200) present in the target space (102).

According to this aspect, it is possible to control the state of suction by the suction unit (21) according to the person-related information about the person (200) existing in the target space (102).

In the gas detection system (1) according to the fourth aspect, in the first aspect, the determination information includes air-conditioning information regarding the operation status of the air-conditioning system (40) and human-related information regarding a person present in the target space (102). It further includes at least one of the information. The air conditioning system (40) conditions the air in the target space (102). Weighting coefficients (B1, B2, B3) used for controlling the suction state of the suction unit (21) are attached to a plurality of pieces of information included in the judgment information.

According to this aspect, the suction control section (12) determines the suction state of the suction section (21) based on the plurality of pieces of information, with distribution according to the weighting coefficients (B1, B2, B3) attached to the plurality of pieces of information. can be controlled.

In the gas detection system (1) according to the fifth aspect, in the third or fourth aspect, the person-related information includes information about the state of persons present in the target space (102).

According to this aspect, the suction control section (12) can control the state of suction by the suction section (21) based on the information regarding the state of the person present in the target space (102).

In the gas detection system (1) according to the sixth aspect, in any one of the first to fifth aspects, the state of suction by the suction portion (21) includes the air suction force by the suction portion (21).

According to this aspect, the suction control section (12) can control the air suction force of the suction section (21) based on the determination information.

In the gas detection system (1) according to the seventh aspect, in any one of the first to sixth aspects, the state of suction by the suction part (21) includes the time during which the suction part (21) sucks air.

According to this aspect, the suction control section (12) can control the time during which the suction section (21) sucks air based on the determination information.

A gas detection system (1) according to an eighth aspect, in any one of the first to seventh aspects, further comprises a judgment part (13) for judging whether or not to cause the suction part (21) to suck air. .

According to this aspect, the suction of air by the suction section (21) can be stopped according to the determination result of the determination section (13).

A gas detection system (1) according to a ninth aspect, in any one of the first to eighth aspects, further comprises a receiving section (11) for receiving input of instruction information indicating a gas component to be detected.

According to this aspect, the suction control section (12) can control the state of air suction by the suction section (21) based on the gas component instructed by the instruction information received by the reception section (11). .

In the gas detection system (1) according to the tenth aspect, in any one of the first to ninth aspects, the suction control section (12) detects the gas component to be detected according to the situation of the target space (102). to decide.

According to this aspect, the suction control section (12) can control the state of suction by the suction section (21) according to the gas component to be detected determined according to the situation of the target space (102).

The gas detection system (1) according to the eleventh aspect, in any one of the first to tenth aspects, further comprises an output processing section (14) for outputting the detection result of the gas detection section (22).

According to this aspect, for example, the device that receives the detection result output from the output processing section (14) can perform processing based on the detection result of the gas detection section (22).

In the gas detection system (1) according to the twelfth aspect, in any one of the first to eleventh aspects, the target space (102) includes the indoor space (102) of the moving body (100).

According to this aspect, the gas detection system (1) can detect gas components from the air in the indoor space (102) of the moving body (100).

In the gas detection system (1) according to the thirteenth aspect, in the twelfth aspect, the suction part (21) is a partial space in the indoor space (102) where the driver (201) of the moving object (100) exists. Air is sucked from (103).

According to this aspect, the gas detection system (1) can detect gas components from the air in the partial space (103) where the driver (201) is present.

In the gas detection system (1) according to the fourteenth aspect, in the twelfth or thirteenth aspect, the gas detection unit (22) is installed inside the seat (110) of the mobile object (100).

According to this aspect, there is an advantage that the gas detection part (22) is inconspicuous.

A control method for a gas detection system (1) according to a fifteenth aspect includes processing for controlling a state of suction by a suction section (21) based on determination information. The suction part (21) sucks air from the target space (102) and guides the sucked air to the gas detection part (22). A gas detector (22) detects gas components in the air. The determination information includes at least target component information regarding the gas component to be detected by the gas detection section (22).

According to this aspect, it is possible to provide a control method for a gas detection system (1) capable of efficiently collecting air.

A program according to a sixteenth aspect is a program for causing a computer system to execute a process of controlling the state of suction by a suction section (21) based on determination information. The suction part (21) sucks air from the target space (102) and guides the sucked air to the gas detection part (22). A gas detector (22) detects gas components in the air. The determination information includes at least target component information regarding the gas component to be detected by the gas detection section (22).

According to this aspect, it is possible to provide a program for realizing a gas detection system (1) capable of efficiently collecting air.

In the gas detection system (1) according to the seventeenth aspect, in any one of the first to fourteenth aspects, the gas detection section (22) detects gas components in exhaled breath of the person (200).

In the gas detection system (1) according to the eighteenth aspect, in any one of the first to fourteenth and seventeenth aspects, the gas detection section (22) detects gas components generated due to stress.

Various configurations (including modifications) of the gas detection system (1) according to the above embodiment are not limited to the above aspects, and may be a control method, a (computer) program, or a recorded program for the gas detection system (1). It can be embodied in a non-temporary recording medium or the like.

The configurations according to the second to fourteenth, seventeenth, and eighteenth aspects are not essential configurations for the gas detection system (1), and can be omitted as appropriate.

Reference Signs List 1 gas detection system 11 reception unit 12 suction control unit 13 determination unit 14 output processing unit 21 suction unit 22 gas detection unit 40 air conditioning system 100 moving body 102 indoor space (target space)
103 Subspace 110 Seats 200 People 201 Drivers B1-B3 Coefficients

Claims (15)

a suction unit that sucks air from a target space and guides the sucked air to a gas detection unit that detects gas components in the air;
a suction control unit that controls a state of suction by the suction unit based on determination information including at least target component information regarding a gas component to be detected by the gas detection unit ;
The determination information further includes at least one of air-conditioning information regarding the operation status of an air-conditioning system that adjusts the air in the target space and person-related information regarding a person present in the target space,
A plurality of pieces of information included in the determination information are each assigned a weighting factor used when controlling the state of suction by the suction unit.
Gas detection system. the judgment information further includes the air conditioning information;
The gas detection system of Claim 1. the judgment information further includes the person- related information;
The gas detection system according to claim 1 or 2. the person-related information includes information about the state of a person present in the target space;
The gas detection system according to any one of claims 1-3. The state of suction by the suction unit includes the suction force of the air by the suction unit,
The gas detection system according to any one of claims 1-4. The suction state by the suction unit includes the time for the suction unit to suck the air,
The gas detection system according to any one of claims 1-5. Further comprising a judgment unit for judging whether or not to cause the suction unit to suck the air,
The gas detection system according to any one of claims 1-6. further comprising a reception unit that receives input of instruction information that instructs the gas component to be detected;
The gas detection system according to any one of claims 1-7. The suction control unit determines the gas component to be detected according to the situation of the target space.
The gas detection system according to any one of claims 1-8. Further comprising an output processing unit that outputs a detection result of the gas detection unit,
The gas detection system according to any one of claims 1-9. wherein the target space includes an indoor space of a moving object;
The gas detection system according to any one of claims 1-10. The suction unit sucks the air from a partial space in which a driver of the moving object exists in the indoor space.
12. The gas detection system of claim 11. The gas detection unit is installed inside the seat of the mobile body,
The gas detection system according to claim 11 or 12. Air is sucked from a target space, the sucked air is led to a gas detection unit that detects gas components in the air, and target component information about gas components to be detected by the gas detection unit is obtained. At least including a process of controlling based on judgment information including,
The determination information further includes at least one of air-conditioning information regarding the operation status of an air-conditioning system that adjusts the air in the target space and person-related information regarding a person present in the target space,
A plurality of pieces of information included in the determination information are each assigned a weighting factor used when controlling the state of suction by the suction unit.
A control method for a gas detection system. to the computer system,
Air is sucked from a target space, the sucked air is led to a gas detection unit that detects gas components in the air, and target component information about gas components to be detected by the gas detection unit is obtained. executing a control process based on at least the judgment information included;
The determination information further includes at least one of air-conditioning information regarding the operation status of an air-conditioning system that adjusts the air in the target space and person-related information regarding a person present in the target space,
A plurality of pieces of information included in the determination information are each assigned a weighting factor used when controlling the state of suction by the suction unit.
program.

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